glib/gatomic.h

   1 /*
   2  * Copyright © 2011 Ryan Lortie
   3  *
   4  * This library is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU Lesser General Public License as
   6  * published by the Free Software Foundation; either version 2 of the
   7  * licence, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17  * USA.
  18  *
  19  * Author: Ryan Lortie <desrt@desrt.ca>
  20  */
  21
  22 #if defined(G_DISABLE_SINGLE_INCLUDES) && !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
  23 #error "Only <glib.h> can be included directly."
  24 #endif
  25
  26 #ifndef __G_ATOMIC_H__
  27 #define __G_ATOMIC_H__
  28
  29 #include <glib/gtypes.h>
  30
  31 G_BEGIN_DECLS
  32
  33 gint                    g_atomic_int_get                      (volatile gint  *atomic);
  34 void                    g_atomic_int_set                      (volatile gint  *atomic,
  35                                                                gint            newval);
  36 void                    g_atomic_int_inc                      (volatile gint  *atomic);
  37 gboolean                g_atomic_int_dec_and_test             (volatile gint  *atomic);
  38 gboolean                g_atomic_int_compare_and_exchange     (volatile gint  *atomic,
  39                                                                gint            oldval,
  40                                                                gint            newval);
  41 gint                    g_atomic_int_add                      (volatile gint  *atomic,
  42                                                                gint            val);
  43 guint                   g_atomic_int_and                      (volatile guint *atomic,
  44                                                                guint           val);
  45 guint                   g_atomic_int_or                       (volatile guint *atomic,
  46                                                                guint           val);
  47 guint                   g_atomic_int_xor                      (volatile guint *atomic,
  48                                                                guint           val);
  49
  50 gpointer                g_atomic_pointer_get                  (volatile void  *atomic);
  51 void                    g_atomic_pointer_set                  (volatile void  *atomic,
  52                                                                gpointer        newval);
  53 gboolean                g_atomic_pointer_compare_and_exchange (volatile void  *atomic,
  54                                                                gpointer        oldval,
  55                                                                gpointer        newval);
  56 gssize                  g_atomic_pointer_add                  (volatile void  *atomic,
  57                                                                gssize          val);
  58 gsize                   g_atomic_pointer_and                  (volatile void  *atomic,
  59                                                                gsize           val);
  60 gsize                   g_atomic_pointer_or                   (volatile void  *atomic,
  61                                                                gsize           val);
  62 gsize                   g_atomic_pointer_xor                  (volatile void  *atomic,
  63                                                                gsize           val);
  64
  65 #ifndef G_DISABLE_DEPRECATED
  66 gint                    g_atomic_int_exchange_and_add         (volatile gint  *atomic,
  67                                                                gint            val);
  68 #endif
  69
  70 G_END_DECLS
  71
  72 #if defined(__GNUC__) && defined(G_ATOMIC_OP_USE_GCC_BUILTINS)
  73
  74 #define g_atomic_int_get(atomic) \
  75   (__extension__ ({                                                          \
  76     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
  77     (void) (0 ? *(atomic) ^ *(atomic) : 0);                                  \
  78     __sync_synchronize ();                                                   \
  79     (gint) *(atomic);                                                        \
  80   }))
  81 #define g_atomic_int_set(atomic, newval) \
  82   (__extension__ ({                                                          \
  83     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
  84     (void) (0 ? *(atomic) ^ (newval) : 0);                                   \
  85     *(atomic) = (newval);                                                    \
  86     __sync_synchronize ();                                                   \
  87   }))
  88 #define g_atomic_int_inc(atomic) \
  89   (__extension__ ({                                                          \
  90     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
  91     (void) (0 ? *(atomic) ^ *(atomic) : 0);                                  \
  92     (void) __sync_fetch_and_add ((atomic), 1);                               \
  93   }))
  94 #define g_atomic_int_dec_and_test(atomic) \
  95   (__extension__ ({                                                          \
  96     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
  97     (void) (0 ? *(atomic) ^ *(atomic) : 0);                                  \
  98     __sync_fetch_and_sub ((atomic), 1) == 1;                                 \
  99   }))
 100 #define g_atomic_int_compare_and_exchange(atomic, oldval, newval) \
 101   (__extension__ ({                                                          \
 102     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
 103     (void) (0 ? *(atomic) ^ (newval) ^ (oldval) : 0);                        \
 104     (gboolean) __sync_bool_compare_and_swap ((atomic), (oldval), (newval));  \
 105   }))
 106 #define g_atomic_int_add(atomic, val) \
 107   (__extension__ ({                                                          \
 108     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
 109     (void) (0 ? *(atomic) ^ (val) : 0);                                      \
 110     (gint) __sync_fetch_and_add ((atomic), (val));                           \
 111   }))
 112 #define g_atomic_int_and(atomic, val) \
 113   (__extension__ ({                                                          \
 114     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
 115     (void) (0 ? *(atomic) ^ (val) : 0);                                      \
 116     (guint) __sync_fetch_and_and ((atomic), (val));                          \
 117   }))
 118 #define g_atomic_int_or(atomic, val) \
 119   (__extension__ ({                                                          \
 120     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
 121     (void) (0 ? *(atomic) ^ (val) : 0);                                      \
 122     (guint) __sync_fetch_and_or ((atomic), (val));                           \
 123   }))
 124 #define g_atomic_int_xor(atomic, val) \
 125   (__extension__ ({                                                          \
 126     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gint));                     \
 127     (void) (0 ? *(atomic) ^ (val) : 0);                                      \
 128     (guint) __sync_fetch_and_xor ((atomic), (val));                          \
 129   }))
 130
 131 #define g_atomic_pointer_get(atomic) \
 132   (__extension__ ({                                                          \
 133     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 134     __sync_synchronize ();                                                   \
 135     (gpointer) *(atomic);                                                    \
 136   }))
 137 #define g_atomic_pointer_set(atomic, newval) \
 138   (__extension__ ({                                                          \
 139     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 140     (void) (0 ? (gpointer) *(atomic) : 0);                                   \
 141     *(atomic) = (__typeof__ (*(atomic))) (gsize) (newval);                   \
 142     __sync_synchronize ();                                                   \
 143   }))
 144 #define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \
 145   (__extension__ ({                                                          \
 146     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 147     (void) (0 ? (gpointer) *(atomic) : 0);                                   \
 148     (gboolean) __sync_bool_compare_and_swap ((atomic), (oldval), (newval));  \
 149   }))
 150 #define g_atomic_pointer_add(atomic, val) \
 151   (__extension__ ({                                                          \
 152     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 153     (void) (0 ? (gpointer) *(atomic) : 0);                                   \
 154     (void) (0 ? (val) ^ (val) : 0);                                          \
 155     (gssize) __sync_fetch_and_add ((atomic), (val));                         \
 156   }))
 157 #define g_atomic_pointer_and(atomic, val) \
 158   (__extension__ ({                                                          \
 159     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 160     (void) (0 ? (gpointer) *(atomic) : 0);                                   \
 161     (void) (0 ? (val) ^ (val) : 0);                                          \
 162     (gsize) __sync_fetch_and_and ((atomic), (val));                          \
 163   }))
 164 #define g_atomic_pointer_or(atomic, val) \
 165   (__extension__ ({                                                          \
 166     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 167     (void) (0 ? (gpointer) *(atomic) : 0);                                   \
 168     (void) (0 ? (val) ^ (val) : 0);                                          \
 169     (gsize) __sync_fetch_and_or ((atomic), (val));                           \
 170   }))
 171 #define g_atomic_pointer_xor(atomic, val) \
 172   (__extension__ ({                                                          \
 173     G_STATIC_ASSERT (sizeof *(atomic) == sizeof (gpointer));                 \
 174     (void) (0 ? (gpointer) *(atomic) : 0);                                   \
 175     (void) (0 ? (val) ^ (val) : 0);                                          \
 176     (gsize) __sync_fetch_and_xor ((atomic), (val));                          \
 177   }))
 178
 179 #else /* defined(__GNUC__) && defined(G_ATOMIC_OP_USE_GCC_BUILTINS) */
 180
 181 #define g_atomic_int_get(atomic) \
 182   (g_atomic_int_get ((gint *) (atomic)))
 183 #define g_atomic_int_set(atomic, newval) \
 184   (g_atomic_int_set ((gint *) (atomic), (gint) (newval)))
 185 #define g_atomic_int_compare_and_exchange(atomic, oldval, newval) \
 186   (g_atomic_int_compare_and_exchange ((gint *) (atomic), (oldval), (newval)))
 187 #define g_atomic_int_add(atomic, val) \
 188   (g_atomic_int_add ((gint *) (atomic), (val)))
 189 #define g_atomic_int_and(atomic, val) \
 190   (g_atomic_int_and ((gint *) (atomic), (val)))
 191 #define g_atomic_int_or(atomic, val) \
 192   (g_atomic_int_or ((gint *) (atomic), (val)))
 193 #define g_atomic_int_xor(atomic, val) \
 194   (g_atomic_int_xor ((gint *) (atomic), (val)))
 195 #define g_atomic_int_inc(atomic) \
 196   (g_atomic_int_inc ((gint *) (atomic)))
 197 #define g_atomic_int_dec_and_test(atomic) \
 198   (g_atomic_int_dec_and_test ((gint *) (atomic)))
 199
 200 #define g_atomic_pointer_get(atomic) \
 201   (g_atomic_pointer_get (atomic))
 202 #define g_atomic_pointer_set(atomic, newval) \
 203   (g_atomic_pointer_set ((atomic), (gpointer) (newval)))
 204 #define g_atomic_pointer_compare_and_exchange(atomic, oldval, newval) \
 205   (g_atomic_pointer_compare_and_exchange ((atomic), (gpointer) (oldval), (gpointer) (newval)))
 206 #define g_atomic_pointer_add(atomic, val) \
 207   (g_atomic_pointer_add ((atomic), (gssize) (val)))
 208 #define g_atomic_pointer_and(atomic, val) \
 209   (g_atomic_pointer_and ((atomic), (gsize) (val)))
 210 #define g_atomic_pointer_or(atomic, val) \
 211   (g_atomic_pointer_or ((atomic), (gsize) (val)))
 212 #define g_atomic_pointer_xor(atomic, val) \
 213   (g_atomic_pointer_xor ((atomic), (gsize) (val)))
 214
 215 #endif /* defined(__GNUC__) && defined(G_ATOMIC_OP_USE_GCC_BUILTINS) */
 216
 217 #endif /* __G_ATOMIC_H__ */